Copyright © Philip M. Parker, INSEAD. Terms of Use.
| Year | Description |
| 2000 | Invention patented by Katsutoshi Yamane on September 27th, 2000. Abstract: A black and white photothermographic material for laser exposure affording a large covering power and thus affording a high Dmax, and capable of suppressing desensitization in the course of the storage is provided. Such black and white photothermographic material contains on one side of a support a reducing agent for reducing silver ion, a binder, a non-photosensitive fatty acid silver salt and a photosensitive silver halide, wherein the photosensitive silver halide forms grains with an average grain size of 10 nm to 50 nm prepared independently from the non-photosensitive fatty acid silver salt; and wherein a compound expressed by the formula (1) below is further contained: [where, in the formula (1), Z represents --SO.sub.3 M.sup.2, --COOR.sup.1, --OH or --NHR.sup.2 ; in which M.sup.2 being a hydrogen atom or an alkali metal atom, R.sup.1 being a hydrogen atom, an alkali metal atom or an alkyl group with having 1 to 6 carbon atoms, R.sup.2 being a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, --COR.sup.4, --COOR.sup.4 or --SO.sub.2 R.sup.4, in which R.sup.4 being a hydrogen atom, an aliphatic group or an aromatic group; m is an integer not less than 1, and for the case of m.gtoreq.2, the groups Z in a number of m may be same or different with each other; L represents a single bond or a linkage group; n is an integer not less than 1, and for the case of n.gtoreq.2, the groups (Z).sub.m L in a number of n may be same or different with each other; A is a heterocyclic group which may be substituted; and M.sup.1 is a hydrogen atom or an alkali metal atom.] |
| Source: selected by the editor from original sources. | |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
